How Our For-Profit Legacy Bank Works

A long-service-life platform where the design goal is maintainability rather than novelty. Requirements are documented before any code, because verbal scope is what produces rebuilds two years later. The architecture is modular so a component can be replaced without disturbing the rest, and automated tests surround the revenue-critical paths where a silent failure costs money directly. Dependencies are pinned by exact version and tracked against known vulnerabilities. Full technical documentation is a deliverable, so the next developer can read the system instead of proposing to replace it.